EP3157774A1 - Panoramic extended windshield with integrated non-moving blind - Google Patents
Panoramic extended windshield with integrated non-moving blindInfo
- Publication number
- EP3157774A1 EP3157774A1 EP15723763.7A EP15723763A EP3157774A1 EP 3157774 A1 EP3157774 A1 EP 3157774A1 EP 15723763 A EP15723763 A EP 15723763A EP 3157774 A1 EP3157774 A1 EP 3157774A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle glazing
- glazing
- vehicle
- film
- blind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
- B60J3/04—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles adjustable in transparency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
- B32B17/10467—Variable transmission
- B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
- B32B17/10504—Liquid crystal layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/001—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles integrated in the windows, e.g. Fresnel lenses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0126—Opto-optical modulation, i.e. control of one light beam by another light beam, not otherwise provided for in this subclass
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/422—Luminescent, fluorescent, phosphorescent
Definitions
- the presently disclosed invention is directed to the use of electrically controlled variable light transmittance films, such as PDLC and SPD in a panoramic automotive glazing.
- electrically controlled variable light transmittance films such as PDLC and SPD in a panoramic automotive glazing.
- windshields were typically mounted at a nearly vertical installation angle 108 and had little or no vertical curvature.
- several models produced from the mid-50s through the mid-60s were outfitted with what was then called a panoramic windshield.
- This windshield extended the vertical edges to wrap around and into the area typically occupied by the A-pillar. Due to the small radius of the wrap, the optical quality in this area was poor.
- the windshield driver vision zones, per J903, are calculated with the windshield at installation angle 108.
- the installation angle 108 is the angle relative to horizontal 102 of a cord 104 connecting the top and bottom points of the vertical centerline 106.
- SAEJ903 calls for the use of a statistical analysis of a driver population to generate an elliptical shape that is defined by J903 as an "eyelipsise".
- the eyelipsise bounds an area which will include the eye points for most of the population.
- the eye point 100 of a statistically tall driver is used to determine the top edge of the vision zone.
- J903 calls for creating a horizontal plane, passing through the tall driver eye point, and then rotating the plane about the driver eye point upward by 10 degrees. The intersection of the rotated plane and the windshield form the top of the driver vision zone.
- This imaginary line 14 is known as the AS1 line. Government safety regulations require that this location be permanently marked on every windshield.
- the area below the AS1 mark must have light transmittance of at least 70% for vehicles sold in the United Sates, and must not be otherwise obscured by the rear view mirror, the black band 10, or any other objects.
- Vision zones for vehicles manufactured in the European Union must comply with ECE R43 which is similar to the US regulation with the one major exception which requires that the light transmittance below the AS1 line must be at least 75%.
- the method for calculating the bottom of the zone is similar to the method used for the top but based upon the eye point of a statistically short driver and at a smaller rotation angle.
- the end result is a total minimum driver vision zone angle of less than 20 degrees. While this is adequate for most driving conditions, it can make it difficult to see high mounted signals and signs under some circumstances, such as when facing downhill, with such a limited view. In some parts of the world driver eye-level traffic signals are used in addition to the overhead signals for this reason.
- the windshield shown in Figure 1 has an installation angle of 23 degrees. It can be seen that the sheet metal 16 of the roof is tangent to the windshield at the top edge of the windshield where the two meet. If the top edge of the windshield were to be extended by just 10- 15cm, the driver vision could be increased from 10 degrees relative to horizontal to 45 degrees or better.
- a perspective view of the windshield and sheet metal 16 is shown in Figure 2.
- FD is the force of drag
- p is the mass density of air
- v is the velocity of the vehicle
- A is the frontal area of the vehicle.
- a vehicle with a flat box like front end might have a drag coefficient close to 1 while a high speed train or exotic car might be less than 0.3.
- a windshield with a lower installation angle will be more efficient that one with a higher angle, with all else the same.
- the discontinuity between the edge of the glass and the sheet metal is a source of drag and also a source of cabin noise. This has driven the trend towards flush glazing and the elimination of decorative trim and moldings.
- the top edge of a conventional windshield is one of the areas where turbulent energy consuming air flow occurs at the interface between the windshield and the sheet metal. Moving the interface into the roof-line would improve drag but this has not been commonly done.
- the lower installation angle also allows for the sheet metal of the roof to be designed such that it is tangent to the windshield and has a large radii transition from the windshield to the largely horizontal roof. This makes it possible to produce a windshield that has a panoramic viewing angle in the vertical direction which will have good optics in the transition area and be possible and economical to fabricate using conventional glass bending processes.
- Nagy et.al extends the top edge of the windshield in order to provide an electromagnetically transparent cover for an "antenna shelf to be used for GPS, GSM, satellite and other signals rather than for vision or aerodynamics. The extended portion is not for driver vision and is covered by the black band 10.
- the Opel Astra GTC vehicle first produced in the 2005 model year, is one of the few examples of a series production vehicle with a panoramic windshield.
- the top edge extended well into the roof line and above the drive and front seat passenger.
- the roof portion was equipped with a mechanic blind that added cost and weight and limited the glass functionality as it either blocked 100% the visible light or none, all shortcomings of the prior art.
- the market indicates that there is a desire for improved vision and an increased level of natural light in the passenger compartment that a panoramic windshield would provide. Styling trends for many years now have favored larger glazed areas on vehicles which has the added benefit in that it also reduces weight.
- the transparent roof panel While the purpose of the transparent roof panel is to allow light to enter the vehicle, it is possible that under some circumstances it may be desirable to limit the amount of light entering the vehicle. On a bright sunny day, the intensity of the light can become uncomfortable to the skin and eyes.
- the solar radiation entering through the roof panel also can rapidly heat the interior of the vehicle increasing the load on the air- conditioning system and increasing the interior temperature of a parked vehicle by several degrees. As a result dark tinted glass, with an approximate light transmittance of 20%, is typically used. However, in cold environments, the increased cabin solar radiation can help to keep the interior of the vehicle warm.
- FIG. 3 An example of the prior art is shown in Figure 3.
- the roof area above the driver has been replaced with a transparent panel 18.
- Tempered dark tint glass that transmits just 20% of the available solar energy, is typically used. Glass with a higher light transmission is not used as the vehicle will rapidly heat on a bright day. This approach limits the maximum light intensity but also limits the energy entering the cabin when it may be desirable to have more light and solar energy enter the cabin.
- shading means is typically provided to limit the light in addition to the tinted glass.
- a sliding opaque panel is normally provided to control the amount of light entering from the sunroof 18 of Figure 3. With a 20% tint sunroof, the light entering can be regulated from 20% down to zero. Clearly, a wider range would be beneficial.
- FIG. 4 shows that substantially the entire horizontal portion of the roof has been replaced by the panoramic roof 20.
- the only remaining sheet metal 16 of the roof is in the transition area between the panoramic roof and the windshield.
- Most panoramic roof systems comprise two or more transparent glass panels. The panels also are typically made with a dark tint glass and so share the same disadvantages of the smaller sunroof of the prior art.
- a sliding flat panel cannot be used as a shade on a panoramic sun roof.
- a number of roller blind type shading means have been developed.
- a transparent roof system for an automobile is disclosed by US 20070182217 Al.
- a transparent panel extends from the top front edge of the front windshield to the top edge of the rear window.
- the two gaps between the windshield, roof and rear window are minimized to provide for improved aesthesis, aerodynamic drag and lowered wind noise.
- This has the same advantages and disadvantage of the prior art previously described as dark tinted glass is used and a shading means must be provided.
- one of the fundamental problems of the prior art is the dependence on the use of a dark tint to limit the maximum light transmittance. It would be beneficial, in cold climates, to allow as much energy as possible to enter the cabin through the roof.
- variable light transmittance (tint) glazing which can switch from high transmittance to low transmittance.
- the primary technologies in commercial use are: Electrochromic, Suspended Particle Devices (SPD), and Polymer Dispersed Liquid Crystal (PDLC).
- SPD Suspended Particle Devices
- PDLC Polymer Dispersed Liquid Crystal
- Electrochromic switchable materials are chemical compounds that change from a transparent state to a less transparent state when a low voltage direct current is passed through the compound. These materials undergo a reversible chemical reaction in response to electric current. Electrochromic devices have very low power requirements and will maintain their last state in the absence of power for an extended period. Reversing the polarity of the current will return the compound to its previous state. Switching time is on the order of several seconds, from light to dark and back. Large Electrochromic windows can be found on one of the newer jumbo jets. The primary automotive application to date has been for the near ubiquitous self-dimming rear view mirrors. Only a small number of high end exotic vehicles have been built with Electrochromic sunroofs even though the technology has been commercially available for well over 10 years.
- SPD makes use of high aspect ratio needle like particles (light valves) which when placed in an electric field will align with the field. When the field is switched off, the molecules take on a random light blocking orientation. The extent of alignment varies with the magnitude of the applied alternating current (AC) peak to peak voltage allowing the tint to be set to any point between the two states. SPD will not switch with DC current.
- AC alternating current
- PDLC makes use of molecules that are sensitive to an electrical field. The main functional difference is that PDLC primarily scatters light going from clear to opaque. PDLC, like SPD, also operates on alternating current and is sensitive to the magnitude of the applied peak to peak voltage. PDLC will transition from clear to opaque and can be set to any point in-between. PDLC will not switch with DC current.
- SPD and PDLC are very different chemically but the assembled film shares a common manufacturing process and actuating means. Both switch in response to an AC electric filed.
- Early implementations sandwiched the active SPD or PDLC material between sheets of transparent conductive coated glass.
- the conductive coating was used to apply the electrical field.
- a more economical approach replaces the two sheets of conductive coated glass with two sheets of a transparent conductive coated plastic substrate which are used to encapsulate the SPD or PDLC active material.
- the assembled film 130 is then laminated between two sheets of glass to provide for durability.
- At least three high end passenger vehicles are known to be in series production, in the 2014 model year, that are equipped with switchable panoramic roofs systems.
- US 8102586 B2, US 20130038093 Al, US 20070182217 Al and US 20120307337 Al each disclose some aspect of a switchable automotive glazing.
- Drapes, shutters, shades and blinds are among the means that have been used for centuries to limit the amount of light entering through a window and to provide privacy. Some time may be required for consumers to develop an appreciation for windows that can limit light and provide privacy without the aforementioned mechanical means. Chances are that consumers will continue to install drapes, shutters, blinds and shutter just for pure aesthetic reasons on their switchable windows. Note that non-functioning shutters are installed on millions of homes.
- WO1999018320 Al describes a method for segmenting the switchable area into separate addressable elements.
- PDLC has the additional disadvantage that intermediate states have a hazy appearance which tends to give the viewer the perception that they are looking through "cheap" plastic.
- a supporting structure is still needed to mount the glazing and to support the rear view mirror, cabin lights, sun visors and other elements. These elements can weigh several kilograms.
- the actual drive field of vision is still interrupted at the transition from the windshield to the roof.
- DEI 02004010790 Al describes means for mounting a sun visor to the A pillars (the left/right sets of pillars supporting the roof are designated as the A, B and C pillars.
- the A pillars support the front of the roof
- the B provides support between the front and rear doors
- the C pillars support the rear of the roof).
- Such a windshield by itself is not adequate as a shading means must be provided.
- Flat sliding panel and rollup type sun shades are not desirable as little space is available.
- sun visors can be mounted to the glass or the A pillars, they do not shade the overhead portions. Therefore, an electrically switchable material is laminated between the glass layers to form a blind and provide the sun shade function. The same material can also be used to provide the sun visors.
- the material is segmented into electrically separate circuits or "slates" to form a structure emulating a window blind. The same can be done with the visors as well, emulating the familiar rectangular shape.
- a controlling means allows the blind to be opened or closed in any desired sequence.
- Said controlling means can be equipped with a programmable user interface, which can be a smart phone or tablet, allowing the user to modify and add sequences.
- Said controlling means also can operate a sound emitting means which can be programed to produce any type of sound, as may be desired, synchronized with the operation of the blind.
- the sound of a plastic blind opening can be used to supplement the aesthetic of a conventional window blind.
- the user may opt for: musical notes, a slamming dungeon door, a phasor gun or just about anything imaginable, the novelty of which will appeal to a large segment of the buying public.
- Said controlling means can incorporate touch sensitive switches integrated with the glass.
- a flexible information display can also be integrated with the glass.
- the switchable material does not in any way encroach upon the vehicle headroom, is lighter than alternate implementations, has fewer parts, lower weight, lower labor, requires less vehicle assembly time and can be installed using the same tools, methods and systems already used to install windshields of the prior art.
- high transmittance glass can be used, in conjunction with the blind, allowing the vehicle to take full advantage of the free solar energy while not overheating the vehicle on hot days.
- Figure 1 shows the driver forward vision zone upper limit.
- Figure 2 shows a sheet metal roof and windshield of the prior art.
- Figure 3 show a sheet metal roof with sunroof and windshield of the prior art.
- Figure 4 shows a panoramic glass roof and windshield of the prior art.
- Figure 5 shows an extended windshield with switchable visor, two slat blind and mounting studs for center console.
- Figure 6 shows an extended windshield incorporating entire roof, with switchable dual rectangular visors and eighteen slat blind.
- Figure 7 shows an extended windshield incorporating entire roof, with switchable visors extending to ASl and eighteen slat blind.
- Figure 8 shows an extended windshield incorporating entire roof, with switchable visors extending to ASl and eighteen slate blind with slates shown with visor and slate above drive in transparent state.
- Figure 9 shows an extended windshield incorporating entire roof, with switchable visors extending to ASl and eighteen slate blind with LED lights along fore-aft centerline and above drive and passenger positions.
- Figure 10 show an extended windshield incorporating entire roof and rear window, with segmented switchable visor extending to ASl and eighteen slate blind.
- Figure 11 shows a sheet of switchable material for shade with 15 slate visor.
- Figure 12 shows a switchable sheet connector detail.
- Figure 13 shows an exploded view: cross section of laminate in blind portion.
- Figure 14 shows an exploded view: cross section of laminate in blind portion with flexible connector.
- Figure 15 shows a cross section of the laminate near an edge with two spacers used to reduce the bending moment and surface tension in the glass that would otherwise occur due to the abrupt change in thickness.
- Figure 16 shows the notch used in the inner ply of glass to protect and hide the connector.
- Figure 17 shows a typical bending iron mold
- Figure 18 shows a switchable film of the prior art.
- Switchable Dual Visors 25 134 Connection pads with 24 Switchable Blind Slats conductive adhesive
- the present invention discloses a vehicle glazing comprising a windshield having the top edge extended such as to provide the driver with an extended vertical viewing angle of at least 45 degrees from the driver eye point as defined by SAE J903 and having an integrated electrically switchable blind system.
- the first embodiment is shown in Figure 5 and is based upon the windshield of Figure 1.
- the bottom front edge 11 has a length of 1550mm and the top edge 15 has a length of 1250mm.
- the vertical centerline 106 length is ⁇ 900mm and the installation angle 108 is 23 degrees.
- Figure 5 shows a mounting means in the form of three studs 30 for attachment to the glass of a center console, mirrors, cameras and other devices as may be required.
- the radius of the transition between the top of the windshield 15 and the portion of the roof 16 that is substantially horizontal is 2000mm. This large radius provides the occupants a view having little if any noticeable optical distortion.
- a black paint band is applied around the edge of glass on the surface of glass to hide the edge of the mounting flange of the vehicle, the adhesive used to mount the glazing, PDLC film and the electrical connectors.
- the top edge of the windshield 14 is extended to include the transitional portion of the roof.
- a heat absorbing glass composition is used for the outer layer while a clear is used for the inner.
- the total light transmittance of the glazing, in the AS1 area, is greater than 75%.
- the PDLC film is used to provide for a two slate blind 24 and dual rectangular sun visors 22.
- the black band 10 is 100 mm at the bottom of the windshield and 35 mm elsewhere.
- the black band serves to hide the edge of the PDLC film and the electrical connections to the PDLC.
- the PDLC has a light transmittance of 60% in the on state and is opaque in the off state.
- Figure 13 shows and exploded view of the cross section of the laminate in the blind area.
- the switchable active material 150 is sandwiched between two sheet of plastic 148 (PET) having a conductive transparent coating 152 (ITO) on the side of the PET 148 facing the active material 150.
- PET sheet of plastic 148
- ITO conductive transparent coating 152
- a C02 LASER, or other appropriate type of LASER, is used to etch conductive circuits 132 in the coating 152.
- the assembled set of components comprising two transparent conductive coated 152 sheets 148 and an active variable light transmittance material 150 shall be referred to as the "film" 130.
- the film 130 is laminated between two sheets of glass 144 using a plastic interlay er 146 (PVB, EVA, PU 38 ⁇ to 76 ⁇ typical). If higher structural strength is desired, an additional sheet of interlayer 146 can be added so as to include a transparent stiffening layer in the laminate. Additional glass/plastic layers can also be added if a ballistic rating is required of the laminate.
- Additional film/plastic layers such as infrared reflecting film, can be added to the entire or a portion of the glazing.
- Heat absorbing, acoustic dampening tinted, security and/or stiffening interlayers may also be used.
- Photochromic interlayer which automatically changes tint in response to the intensity of the sunlight can be used to provide a glazing having high performance in all climates.
- the glass composition used may be provided with an infrared reflecting coating, be of a tinted and/or heat absorbing composition and/or be heat or chemically toughened.
- Figures 11, 12 and 14 show various aspects of how the electrical connection to the film 130 is accomplished. At least one electrical connection must be made to each of the two conductive coated plastic sheets 148. To make electrical connections to the conductive coating 154 on each of the two conductive coated sheets 146, a portion of the opposite facing sheet must be removed, along with the active material so as to expose the conductive coating, that the connection is being made to. The portion of the opposite sheet, where the connection must be made 148, is cut away and the active material 150 is removed.
- thin (25-75 ⁇ ) copper sheet or tape (25-75 ⁇ ) can be used in conjunction with conductive adhesive 154 or alternately a silver paste with tape to hold the copper in place.
- a thin wire or connector 140 is then attached to the copper.
- a flexible printed circuit of the type used in standard electronic products, is used. Copper 124 (5-50 ⁇ thickness) is deposited on a thin durable substrate 156 to form the circuits 124 and connection pads. A conductive paste or adhesive is used to provide a durable connection to the conductive coating 152.
- PDLC film ready to laminate, is commercially available from a number of sources.
- a film 130 comprising two 125 ⁇ thick conductive (Indium Tin Oxide, ITO) coated 152 plastic PET sheets 148, and a 50 ⁇ layer of PDLC emulsion sandwiched in-between the two conductive surfaces, is used to produce the visor and blind slats.
- ITO Indium Tin Oxide
- the present invention discloses three different methods to produce the electrical circuits of the extended windshield of the present invention. The end result is the same for each method.
- the film 130 comprises two conductive coated sheets of PET 148 with the active switchable material 150 placed between the two sheets and with the conductive surface of each PET sheet 152 facing the active material 150.
- the conductive surfaces 152 serves as the neutral of the electrical circuit only one of the sheets needs to have the conductive coatingl52 cut to form the circuits 22 & 24 required to form the separately controlled portions of the film 22 & 24.
- the three methods differ in how the conductive coating is cut.
- the first method to manufacture the film used for the windshield of the present invention consists of the following steps:
- a single sheet of PET 148 is cut to length.
- the sheet is placed on a large flatbed pulsed C02 LASER, with power in the range of 25-100 watts, with the conductive coated side facing towards the LASER.
- the LASER is configured such that the PET substrate is left substantially intact.
- the LASER follows a programmed path to produce a break in the conductive coating providing electrical isolation, between the switchable elements of the circuit 132.
- a single sheet of PDLC film 130 is cut to length.
- the film is placed on a large flatbed pulsed C02 LASER, with power in the range of 25-100 watts. Either side of the film can be face up.
- the LASER is configured such that the top PET sheet and conductive coating is cut through while leaving the bottom layer of PET substantially intact.
- the LASER follows a programmed path to produce a break in the top PET and conductive coating providing electrical isolation, between the switchable elements of the circuit 134.
- a single sheet of PDLC film is cut to length.
- the film is placed on a large flatbed pulsed C02 LASER, with power in the range of 25-100 watts. Either side of the film can be face up.
- the LASER is configured such that the film is cut completely through its thickness.
- the LASER follows a programmed path cutting through both layers of PET and conductive coating providing electrical isolation, between the switchable elements of the circuit 134.
- the three methods can also be performed using a cutting means other than a LASER. It has been found that cutting through either a single or both layers of the PET with a blade results in a very visible separation line. A blade can be used if a visible line is the desired aesthetic.
- Embodiments of the prior art which only lighten and darken the entire switchable area, only require two connections to the film 130, one to each conductive layer 152. This is simple to accomplish with a single length of thin copper strip with a small diameter wire applied to each sheet 148. Often times the thin copper strip, used as a bus bar, 130 is used to bring the electrical connection out from the edge of the laminate.
- the present invention required multiple connections.
- the 18 slat blind embodiments, shown in several of the figures need to have at least 18 connection points, one for each slate comprising the shade, on one layer.
- the electrical connections to the circuits 24 formed in the transparent conductive coating are accomplished through the use of flexible printed circuits as shown in Figures 11 and 12.
- Copper traces 124 are deposited on a thin flexible durable substrate 156 (50 ⁇ polyamide) to form the two connector circuits needed 126 and 140. As the slate 24 and visor 22/32 elements require very little current, the traces 124 are very thin and close together less than 1mm, which allows many traces to be side by side without having a black band 10 that is larger than otherwise required.
- the copper traces 124 are brought out at a single point to a connector 126, which is then used to connect the circuit to the controlling means 17.
- Each trace on the hot side terminates in a pad 134 (59mm x 6mm) and a conductive adhesive 154 is applied to adhere and make an electrical connection to the ITO 152.
- FIG. 11 shows the flexible circuit connectors 128 & 136 that are used on the opposite sides of the PLDC film to provide for the neutral 140 and hot connections 126.
- the inner sheet of glassl62, shown in Figure 16, is notched 162 (3-6mm x 50-150mm) to protect the connector 138 and allow for the flexible connector 138 to be folded over and not be visible from the outside of the vehicle.
- the neutral side only needs a single wire to complete the connection.
- the controlling means 17 used is a small programmable logic controller with 24 solid state outputs used to operate the 2 slate, two visor, extended panoramic windshield.
- the controller 17 can be located at any convenient location. As one practiced in the art can understand, virtually any sequence of operation can be easily programmed and a wide number of means are available for selecting and activating said sequence of operation.
- the slates 24 are switched, one at a time, from end to end, and with a user detectable time delay between slates ( ⁇ 5s though longer delays can be used) with the objective being to mimic the aesthetic of a conventional vertical blind being opened.
- a sound emitting means 21 is used to emit a sound synchronized with the blind operation.
- Said sound can be a musical note, the sound of plastic shuffling as one would hear operating a plastic blind, or a special effect of some kind.
- the user interface to the controlling means 19 can allow the user to program any desired sequence and switching time delay plus to select how each slate is switch.
- Slates have at least two states, opaque and transparent but can have many more.
- the magnitude of the peak to peak AC voltage can be set to opaque, 25%, 50%, 75% and 100% of the maximum level. This can be accomplished using an electronic converter that converts DC to AC or with a rheostat.
- the same method of control can be used for both PDLC and SPD.
- Each state in the blind can go from on to off in one step or in any number of the available steps.
- the interface 19 also can allow the user to personalize their vehicle with one or more of their own sounds just as one would personalize their phone with a ring tone.
- the user interface 19 to the control 17 can be implemented as a separate dedicated interface or integrated into one of the existing vehicle interfaces.
- a wireless interface can also be made to an application running on a smart phone or tablet.
- Capacitive and resistive touch sensitive switches have been well known and in wide use for many years.
- This type of switch 31 can be integrated into the glazing through the use of conductive coatings, embedded wires, silver frit and other means. Any number of operating moods can be envisioned.
- a single touch sensitive switch is provided. In even this case, various options are possible. A short tap can be programmed to open or close the shade one slate at a time whereas touching the switch for a longer period could fully open or close. More switching elements can be provided to allow for more options and even separate control of each individual slate.
- the panoramic windshield can also be equipped with an information display means 31.
- Organic Light Emitting Diode displays are being produced which are very thin and flexible, making it possible to integrate such a display with the glazing.
- Such a display can be located just about the AS1 area 14 and used to display weather, traffic information, GPS data, safety alerts and other data.
- Doublet gravity bending of windshields is used in some embodiments of the present invention to bend the glass. This process is well known to those skilled in the art of windshield manufacturing and is substantially the same process used to produce large commercial vehicle windshields. Doublet gravity bending is the typical method used to manufacture the majority of vehicle windshields worldwide. Two or more sheets of glass 144, cut to shape, are bent using a tool known as a bending iron or bending mould ( Figure 17).
- the bending iron is designed to support the flat unbent glass at multiple level contact points. To do so, the bending iron is manufactured with a rail 145 which is formed perpendicular to the final bent glass surface 144 and shaped to provide support to the bent glass up to 12mm inboard 147 from the edge of the glass.
- the rail 145 is typically constructed from 6.35mm x 25-100mm 304 stainless steel flat stock or sheet. In order to support the flat glass 143 in a level position, the rail must be cut into segments and hinged to open and close as shown in Figure 17 which shows a bending iron in the full open and full close positions as well as the glass overhanging the rail.
- the flat glass 143 is loaded onto the open bending iron and then heated. As the glass 144 softens and sags, the hinged portions of the bending iron move towards the closed position. This process is suitable for producing the Panoramic Extended Windshield described herein.
- the PDLC film is processed as previously described and shown in Figure 11. Opposite edges, top 122 and bottom 120 as shown in the figure, of each PET layer are cut back by 12mm in one of the preferred embodiments of the present invention and the active emulsion is removed exposing the conductive coating.
- the flexible hot and neutral busbar/connector flexible substrates 136, 128 are then adhered to the ITO. Connectors 126, 140 are installed after lamination.
- the flexible connectors are designed such that they are the same thickness as the material that they replace (one layer of PET and the active switchable layer). They are also oversized so that the outboard edge of the connector comes within 3mm of the edge of glass. It can be appreciated that some windshields using thicker or strengthened glass or a different interlayer may not need to extend that close to the edge of glass and that in fact the connector can extend beyond the edge of glass.
- one or more "spacer" layers 158 of PET are added so as to allow for a more gentle transition in thickness spread over a greater distance.
- the total film thickness is 500 ⁇
- a 50mm wide strip of 250u PET would be inserted in the laminate followed by a 25mm wide 125 ⁇ spacer strip.
- any other transparent material that can hold up during the fabrication process and in use could be used. If the edge of the film is in the area hidden by the black paint, the material need not be transparent.
- the glass layers 144, interlayers 146 and processed switchable film 130 with flexible circuits 126/140 are assembled together, placed in a vacuum bag, and then processed in an autoclave.
- the lamination process described is the exact same as used for conventional windshields with embedded wire heating and various types of film so this process will not be described in detail as it is well known to those of ordinary skill in the art of windshield manufacturing.
- the panoramic windshield can be installed using the same automated systems used for ordinary windshields with new end of arm tooling and some adjustment to the working envelope.
- Figure 6 shows a second embodiment of the present invention.
- the top edge has been extended to include substantially the entire roof and includes a dual rectangular visor 22 and an 18 slat PDLC blind 28.
- the addition of the visor eliminates the need to mount a mechanical visor to the glass or A-pillar, adding to the advantages already presented in the first embodiment. All other details are the same as in Embodiment one.
- Third Embodiment is the same as in Embodiment one.
- Figure 7 shows a third embodiment of the present invention.
- the top edge has been extended to include substantially the entire roof and includes a segmented visor 32 extending to the AS1 line and an 18 slat PDLC blind 28.
- Figure 8 shows the third embodiment with the slates in the area above the drive in the on state. All other details are the same as in Embodiment two.
- Figure 9 shows the forth embodiment which is the second embodiment with the addition of LED lighting.
- the LEDs are mounted to a transparent conductive coated substrate and laminated into the glazing.
- One string runs along the centerline from the fore to the aft edge of the roof.
- a second string runs perpendicular to the centerline and provides for passenger and driver reading lamps.
- Figure 10 shows a fifth embodiment of the present invention.
- the top edge has been extended to include substantially the entire roof and rear window and includes an 18 slat PDLC blind 28.
- the addition of the visor eliminates the need to mount a mechanical visor to the glass or A-pillar, adding to the advantages already presented in the first embodiment. All other details are the same as in Embodiment one.
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Abstract
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL15723763T PL3157774T3 (en) | 2014-06-19 | 2015-04-24 | Panoramic extended windshield with integrated non-moving blind |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US14/309,392 US9365161B2 (en) | 2014-06-19 | 2014-06-19 | Panoramic extended windshield with integrated non-moving blind |
PCT/IB2015/053006 WO2015193745A1 (en) | 2014-06-19 | 2015-04-24 | Panoramic extended windshield with integrated non-moving blind |
Publications (2)
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EP3157774A1 true EP3157774A1 (en) | 2017-04-26 |
EP3157774B1 EP3157774B1 (en) | 2021-04-21 |
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EP15723763.7A Active EP3157774B1 (en) | 2014-06-19 | 2015-04-24 | Panoramic extended windshield with integrated non-moving blind |
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US (1) | US9365161B2 (en) |
EP (1) | EP3157774B1 (en) |
KR (1) | KR20170033304A (en) |
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ES (1) | ES2879919T3 (en) |
PE (1) | PE20170402A1 (en) |
PL (1) | PL3157774T3 (en) |
WO (1) | WO2015193745A1 (en) |
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KR20130091661A (en) * | 2010-04-23 | 2013-08-19 | 마그나 미러스 오브 아메리카 인크. | Vehicle window with shade |
US20110273659A1 (en) * | 2010-05-07 | 2011-11-10 | Magna Mirrors Of America, Inc. | Liquid crystal mirror with display |
DE102011013320A1 (en) * | 2011-03-07 | 2012-09-13 | Magna Steyr Fahrzeugtechnik Ag & Co Kg | Motor vehicle e.g. passenger car has sun visor elements that are arranged in primary vision region and secondary vision region so as to darken primary vision region and secondary vision region |
EP2704903B1 (en) * | 2011-05-06 | 2022-07-13 | Pittsburgh Glass Works, LLC | Switchable automotive glazing |
FR2980833A1 (en) | 2011-09-29 | 2013-04-05 | Saint Gobain | GLAZING LIGHTING |
WO2013175025A1 (en) * | 2012-05-21 | 2013-11-28 | Spania Gta Tecnomotive, S.L | Method for obtaining curved transparent elements with integrated variable opacity system and product thereby obtained. |
US9651231B2 (en) | 2012-10-04 | 2017-05-16 | Guardian Industries Corp. | Laminated LED array and/or products including the same |
KR101394724B1 (en) * | 2012-10-30 | 2014-05-15 | 현대자동차주식회사 | Roll blind system for panorama sunloof of vehicle |
US10768447B2 (en) * | 2012-11-01 | 2020-09-08 | Essilor International | Thermally influenced changeable tint device |
-
2014
- 2014-06-19 US US14/309,392 patent/US9365161B2/en active Active
-
2015
- 2015-04-24 WO PCT/IB2015/053006 patent/WO2015193745A1/en active Application Filing
- 2015-04-24 ES ES15723763T patent/ES2879919T3/en active Active
- 2015-04-24 CN CN201580044021.6A patent/CN106687317B/en active Active
- 2015-04-24 KR KR1020177001738A patent/KR20170033304A/en unknown
- 2015-04-24 EP EP15723763.7A patent/EP3157774B1/en active Active
- 2015-04-24 PL PL15723763T patent/PL3157774T3/en unknown
- 2015-04-24 PE PE2016002745A patent/PE20170402A1/en unknown
Also Published As
Publication number | Publication date |
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US20150367782A1 (en) | 2015-12-24 |
EP3157774B1 (en) | 2021-04-21 |
CN106687317B (en) | 2019-08-13 |
KR20170033304A (en) | 2017-03-24 |
WO2015193745A1 (en) | 2015-12-23 |
ES2879919T3 (en) | 2021-11-23 |
CN106687317A (en) | 2017-05-17 |
US9365161B2 (en) | 2016-06-14 |
PE20170402A1 (en) | 2017-04-21 |
PL3157774T3 (en) | 2021-12-06 |
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